Dual-use pen



FIG. 1 is a right side elevational view of a dual-use pen showing my new design;

FIG. 2 is a top end plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a bottom end plan view thereof; and,

FIG. 7 is a top, right front perspective view thereof. 

The ornamental design for a dual-use pen, as shown and described. 